S-300 : Portable Ozone Detector with Relay Outputs

Due to the impact of COVID, we expect a lead time of approximately 12 weeks.

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Product Overview

S-300 Ozone Monitor with relay outputs, 0-5VDC signal output & audible alarm. Choose either a 0.005-0.150, 0.008-0.500 or 0.01-10.00 PPM ozone head range. Battery, AC Adapter, Manual and Calibration sheet Included. An alternative to this product is the S-500.

Monitor Quick Comparison: 
Portable: Yes 
Range: Multiple 
Display: LCD 
Alarm: Yes 
Outputs: Multiple 
Datalogging: No 
Indoor/Outdoor: Indoor

Weight 1 lbs (0.45 kg)
1 lbs (0.45 kg)
1 lbs (0.45 kg)
Warranty 6 Months 6 Months 6 Months
Concentration Range 0 - 0.15 ppm (0 - 150 ppb) 0 - 0.5 ppm (0 - 500 ppb) 0 - 10 ppm (0 - 10000 ppb)
Accuracy < +/- 0.005 ppm From 0 - 0.1 ppm: 
< +/- 0.008 ppm 

From 0.1 - 0.5 ppm: 
+/- 10%
< +/- 0.01ppm + 7.5%
Resolution 0.001 ppm (1 ppb) 0.001 ppm (1 ppb) 0.01 ppm (10 ppb)
Detection Method GSS GSS Electrochemical
Supporting Documents NIST Traceable Calibration Sheet included NIST Traceable Calibration Sheet included NIST Traceable Calibration Sheet included
Response Time 1 minute 1 minute 5 seconds
Optional Accessories Description
International Plug Adapter International Plug Adapter for overseas use. (no voltage converter)
C-40 Small Carrying Case Small Carry Case holds 1 Portable Monitor and 2 sensor heads
R-41 Large Carrying Case Large Carry Case holds 1 Portable Monitor and 7 sensor heads (includes shoulder strap)
RH/Temp Dongle Plug-in SHT7x Sensirion Temperature and Relative Humidity sensor
Wall Mounting Bracket The wall bracket is a light weight mounting device
Remote Sensor Kit The Remote Sensor Kit is designed for applications where the sensor needs to be separate from the monitor base.


  • Interchangeable sensor head
  • External control signals and Alarms
  • Min, Max, and Average capable
  • Can utilize sensor heads for other ranges and gases
  • Consider: Portable. Range: Multiple. Display: LCD. Alarm: Audible. Outputs: Multiple.
More Information
Weight 1.0 lbs (0.45kg)
Electrical 12.6 VDC
Dimensions 7.7 x 4.8 x 2.1 inches (19.5 x 12.2 x 5.4 cm)
Warranty 1 Years
Display Digital
Detection Method HMOS
Temperature Range 23 to 122°F (-5 to 50°C)
Accuracy +/- 100%, dependent on sensor
Resolution 0.0 ppm (0.0 ppb)
Supporting Documents User Manual included (NIST Traceable Calibration Sheet with each head)
Alarm Audible and Visual High and Low alarm setpoints
Has Battery Yes rechargeable, replaceable Lithium Ion battery
Humidity Range 5 to 95%
Internal Datalogging No
Display Units ppm
Communication Protocol None
Relays 1
Multi-Gas Capable Yes. See chart above for Ozone options.